Cleaning device

ABSTRACT

Apparatus and method for receiving and holding debris in a collection chamber of a vacuum cleaner. The collection chamber has an inlet opening through which debris-entrained air enters the collection chamber. When the vacuum cleaner is off, the cover prevents debris from leaving the collection chamber through the inlet opening. The wall of the collection chamber moves when negative pressure is applied to the collection chamber, and the wall movement moves the cover from the inlet opening, allowing the debris-entrained air to enter the collection chamber. In some embodiments, the moving part of the wall is an air filter.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority under 35 U.S.C. 120 and is acontinuation of U.S. patent application Ser. No. 16/671,220, entitled“CLEANING DEVICE” and filed Nov. 1, 2019. U.S. patent application Ser.No. 16/671,220 claims priority under 35 U.S.C. § 119(e) to U.S.Provisional Application No. 62/754,453, entitled “CLEANING DEVICE” andfiled Nov. 1, 2018. The entirety of each referenced application isincorporated herein by reference.

FIELD

Embodiments disclosed herein related generally to cleaning devices, andmore specifically to vacuums and cleaning heads for vacuums.

DESCRIPTION OF THE RELATED ART

Cleaning devices are used in the home and office to clean floors andother surfaces. Various types of cleaning devices are known, such asvacuums with disposable bags, and vacuums with dirt bins that can beemptied and re-used.

SUMMARY

According to one embodiment, an apparatus includes a debris collectionchamber, an air filter configured to allow air to pass through the airfilter while inhibiting debris from passing through the air filter, anda collection chamber inlet opening configured to allow debris-entrainedair to flow into the collection chamber. The air filter is movable froma first position, in which the air filter covers the chamber inletopening, to a second position in which the air filter does not cover thechamber inlet opening.

According to another embodiment, an apparatus adapted to be attached toa vacuum cleaner includes a debris collection chamber and a collectionchamber inlet opening configured to allow debris-entrained air to flowinto the debris collection chamber. The apparatus also includes an airfilter configured to allow air to pass through the air filter whileinhibiting debris from passing through the air filter. A cover isprovided which is movable from a first position in which the covercovers the chamber inlet opening, to a second position in which thecover does not cover the chamber inlet opening. The cover is attached tothe air filter, and the air filter is arranged such that when the airfilter is under no negative pressure, the cover is in the firstposition. The air filter is also arranged such that when negativepressure is applied to the air filter to draw air through the chamberinlet opening, the air filter moves the cover to the second position.

According to yet another embodiment, an apparatus adapted to be attachedto a cleaning device having a suction source is provided. The apparatusincludes a debris collection chamber having a chamber wall that moveswhen negative pressure is applied to the collection chamber, and acollection chamber inlet opening configured to allow air to flow intothe debris collection chamber when negative pressure is applied to thedebris collection chamber. The apparatus also includes a cover movablefrom a first position, in which the cover covers the chamber inletopening, to a second position in which the cover does not cover thechamber inlet opening. The cover is attached to the chamber wall andarranged such that when the chamber wall moves due to the negativepressure being applied the collection chamber, the chamber wall movesthe cover from the first position to the second position in which thecover does not cover the chamber inlet opening, and a flow path isopened for debris-entrained to be drawn into the collection chamberthrough the chamber inlet opening.

According to another embodiment, a method includes attaching a debriscollection chamber to a vacuum cleaner, the collection chamber includinga movable wall, a collection chamber inlet opening, and an inlet openingcover operatively connected to the movable wall. The method furtherincludes activating a suction source that applies a negative pressure tothe debris collection chamber and moves the movable wall, wherein themovement of the wall in response to the application of the negativepressure moves the inlet opening cover from a first position in whichthe inlet opening cover covers the inlet opening, to a second positionin which the inlet opening cover does not cover the inlet opening. Alsoincluded are acts of deactivating the suction source, and removing thedebris collection chamber from the vacuum cleaner.

It should be appreciated that the foregoing concepts, and additionalconcepts discussed below, may be arranged in any suitable combination,as the present disclosure is not limited in this respect.

The foregoing and other aspects, embodiments, and features of thepresent teachings can be more fully understood from the followingdescription in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS

The accompanying drawings are not intended to be drawn to scale. In thedrawings, each identical or nearly identical component that isillustrated in various figures is represented by a like numeral. Forpurposes of clarity, not every component may be labeled in everydrawing. In the drawings:

FIG. 1 is a perspective view of a cleaning device according toembodiments of the present disclosure;

FIG. 2 is a top, front perspective view of a cleaning head according tosome embodiments;

FIG. 3 is an exploded view of the cleaning head of FIG. 2;

FIG. 4 is a top, rear perspective view of the cleaning head of FIG. 2with the filter removed;

FIG. 5 shows the cleaning head of FIG. 2 in a state where negativepressure is being applied to the collection chamber;

FIG. 6 is a cutaway view of the cleaning head of FIG. 2;

FIG. 7 is an exploded view of the cleaning head and sheet assembly;

FIG. 8 is a cross-sectional front view of a cleaning head and apartially lifted top chamber wall according to some embodiments;

FIG. 9 is a cross-sectional front view of a cleaning head and apartially lifted top chamber wall according to alternative embodiments;

FIG. 10 shows a cover stabilizer according to some embodiments;

FIG. 11 is a cross-sectional side view of a cleaning head with a chamberinlet cover arrangement according to some embodiments; and

FIG. 12 shows eight stacked cleaning heads according to someembodiments.

DETAILED DESCRIPTION

Conventional bag vacuums typically require the user to remove a bag froma housing interior, dispose of the bag, and insert a new bag. Removingthe bag can put dust in the air and/or result in spilled debris.Cyclonic vacuum cleaners often have a debris collection chamber that canbe removed from the body of the vacuum, emptied, and reused.

For cleanup jobs that do not require a full size vacuum cleaner, theinventors have appreciated that a debris collection container whichremains closed upon removal from the vacuum can be helpful. Disclosedherein are debris collection chamber arrangements which allowdebris-entrained air to enter a collection chamber through an inletopening when the vacuum cleaner is turned on. The collection chamberarrangements cover the inlet opening when the vacuum cleaner is turnedoff, which limits undesirable release of debris from the collectionchamber. In some embodiments, the collection chamber is disposable, andin some embodiments, the collection chamber is attached to a cleaninghead, and the entire cleaning head is disposable.

To facilitate covering the collection chamber inlet opening, a cover forthe inlet opening may be arranged to move in response to the presence ofnegative pressure in the vacuum cleaner. For example, a planar piece offilter material may cover the inlet opening when the vacuum cleaner isoff. When the vacuum cleaner is turned on and negative pressure isapplied to the filter material, the filter material pulls away from theinlet opening, thereby allowing air and debris to enter the collectionchamber. The inflow of air substantially prevents dirt from exiting thecollection chamber through the inlet opening. When the vacuum cleanersturned off, the filter material returns to its position covering theinlet opening. Such an arrangement provides for covering the inletopening without user intervention.

In some embodiments, the filter material is attached to the debriscollection chamber with an elastic connector. The elastic connectorallows the filter material to be pulled away from the inlet opening whenthe filter material is subjected to a negative pressure by a suctionsource. In other embodiments, no elastic connection is provided, and theinherent flexibility of the filter material allows the filter materialto move away from the inlet opening.

In some embodiments, the cover for the inlet opening is not filtermaterial. For example, a piece of filter material may form substantiallythe entire top wall of a collection chamber, but include an airimpermeable portion which covers and uncovers the inlet opening. Instill other embodiments, an entire top wall of the collection chambermay be formed of a flexible material other than an air filter. The topwall may move to cover and uncover the inlet opening, while a separateportion of the collection chamber has an air outlet that applies anegative pressure to the collection chamber.

By automatically closing the chamber inlet opening when the vacuumcleaner is turned off, the collection chamber may be completely enclosedto limit release of debris. The arrangement can also be helpful to limitspillage or egress of collected debris from the collection chamber whenthe user removes and/or transports the collection chamber for debrisdisposal. In some embodiments, the collection chamber may be adapted forreuse and include an aperture which is selectively openable to discarddebris from the chamber. In other embodiments, the collection chambermay be adapted to be disposed of once the chamber is full. For example,in some embodiments the collection chamber may have no openings otherthan the inlet opening. In some embodiments, the collection chamber isnot openable by a user to dispose of debris from the debris collectionchamber without damaging the debris collection chamber. The collectionchamber may be permanently attached to, and form at least a portion of,a disposable cleaning head in some embodiments, such that the entirehead is disposed of after use.

For purposes herein, debris being suctioned into the debris collectionchamber may include dry and/or wet media. For example, in someembodiments, a liquid applied to the surface may be absorbed by acleaning sheet and/or suctioned by the vacuum into the debris collectionchamber. In some embodiments, the wet media may be absorbed by at leasta portion of the material used to form the debris collection chamber. Insome embodiments, the debris collection chamber may be formed of amaterial which allows for fluid absorption into the material but doesnot allow for liquid transfer through the material. In such embodiments,liquid may not travel through the debris collection chamber. Forexample, the material used to form the debris collection chamber may beabsorptive on an inner side of the debris collection chamber, but liquidimpermeable.

Advantages also may be realized if the user does not have to handle thewet or dirty cleaning head after operation of the cleaning device. Forexample, the cleaning device may be arranged to release the cleaninghead after using the cleaning device such that the user does not have tograsp the cleaning head to discard it. With a permanently attacheddebris collection chamber, and a release arrangement that does notrequire the user to touch the cleaning head, the cleaning head can bedisposed of with limited or no user contact.

In some embodiments, the cleaning head includes a support structure towhich the debris collection chamber is attached. In such embodiments,the user may simply attach the cleaning head to the cleaning device,operate the cleaning device to move dirt from the surface and into thedebris collection chamber, remove the cleaning head, and dispose of thecleaning head in a trash receptacle.

In some embodiments, the cleaning heads are arranged for space-efficientstacking for ease of storage and transport. In some embodiments, thedirt collection chambers are arranged to be collapsible. For example,the dirt collection chamber may include a bag.

FIG. 1 shows a cleaning device 100 according to some embodiments of thepresent disclosure. The cleaning device 100 includes a body 102 with ahandle 104, a connector 106, and a cleaning head 108 which is removablyattachable to the body, such as via the connector. In some embodiments,the handle may have a length that is adjustable to allow a user toadjust the height of the cleaning device.

As shown in FIGS. 2-4, the cleaning head 108 may include a suctionnozzle 107 to remove debris from a surface, and a debris collectionchamber 112 to collect the debris removed from the surface. As will beappreciated, the debris collection chamber may be any suitable type ofcontainer for collecting debris such as dirt, dust, food, or wet media.In some embodiments, the debris collection chamber 112 may bepermanently or removably attached to a cleaning sheet 114. For example,the collection chamber 112 may be glued, heat sealed, or otherwisepermanently affixed to cleaning sheet 114.

In some embodiments, an additional support structure may be provided.For example, a substantially planar support frame may be providedbetween the collection chamber and the sheet, although the supportstructure may have other suitable arrangements.

In some embodiments, the collection chamber 112 protrudes upwardly fromthe cleaning sheet or support structure. For purposes herein, the term“protruding upwardly” means that the collection chamber protrudes awayfrom the support structure in a direction away from the surface beingcleaned.

The collection chamber 112 includes an inlet 115 having an inlet opening116, which in the illustrated embodiment, is located at a top portion ofthe collection chamber 112. The inlet opening 116 is formed by a top rim118 of an upwardly extending wall 120. The inlet 115 may have a ramp 122extending from a suction inlet 124 into the collection chamber to aid inmoving debris from the suction inlet into collection areas 126 a, 126 bof the collection chamber. Though in some embodiments the area below theinlet opening may have a floor that is coplanar with a bottom 127 of thecollection portions of the collection chamber 112.

An air filter 128 forms a top wall of the collection chamber in someembodiments. The filter material may be attached to the collectionchamber such that in a first position, as shown in FIG. 2, the airfilter covers inlet opening 116. In this position, the air filterinhibits debris that has already been collected in collection areas 126a, 126 b from moving over wall 120 and through the inlet opening 116.The air filter and the collection chamber are arranged such that the airfilter is in this first position when negative pressure is not beingapplied to the air filter.

When negative pressure is applied to the air filter, the air filtermoves upwardly (see FIG. 5) and separate from the inlet opening. In thissecond position, debris-entrained air can flow through suction inlet124, up and over wall 120, and into the debris collection areas 126 a,126 b.

As mentioned above, the air filter may be attached to the collectionchamber with an elastic connection. For example, as shown in FIG. 5, anelongated strip 136 of elastic material connects the air filter to a topportion of the collection chamber along a front wall of the collectionchamber. A similar elongated elastic strip (not visible in FIG. 5)connects the air filter to the top portion of the collection chamberalong the rear wall of the collection chamber. The stretchability of theelongated strips allows the air filter to move away from the inletopening. In some embodiments, elastic connectors may be used on one orboth of the walls at the lateral sides of the collection chamber.

In some embodiments, only a portion of the air filter 128 may rise fromthe collection chamber when negative pressure is applied to the cleaninghead. For example, elastic connectors may be provided along only certainportions of the air filter. The elastic portions may be provided in anarea of the air inlet opening such that the air filter lifts only in thearea at or near the air inlet opening, while the remaining areas of theair filter are not substantially lifted.

In still further embodiments, the air filter may be connected to thecollection chamber without any elastic connectors such that the airfilter does not move at the connection points. In such an embodiment,the air filter may have a size and shape which allows the air filter tosufficiently lift away from the air inlet opening when under negativepressure such that the cover lifts away from the air inlet opening. Forexample, adhesive strips 123 may be provided on the filter material 128,to secure the filter material to the collection chamber, as shown by wayof example in FIG. 3.

Materials other than an air filter may be used to cover the inletopening in some embodiments. For example, as shown in FIG. 7, a sectionof air impermeable material may be used in the area of the top wall ofthe collection chamber as a cover 134 for the inlet opening. Cover 134may have the same shape as a perimeter of the chamber inlet opening, orit may have a different shape. In some embodiments, an underside ofcover 134 may be provided with an additional material layer. Forexample, a layer of material which conforms easily to rim 118 may beadhered to an underside of the air filter. Such a layer may act to sealthe inlet opening against passage of debris.

The portions of the top wall outside of the cover 134 are shown as airfilter 128 in the embodiment of FIG. 7, but other materials may be usedto form the top wall of the collection chamber. In some embodiments, theentire top wall may be air impermeable, and one or more air filters maybe provided elsewhere in the arrangement, as discuss below withreference to FIG. 11.

The collection chamber may include stiffening ridges 137 along a bottomof the collection chamber. The stiffening ridges may allow for lessmaterial to be used in forming the collection chamber. The stiffeningridges are shown traveling from front to back in the collection chamber,however, stiffening ridges may be positioned and sized in any suitablemanner. Stiffening grooves may be used instead of, or in addition to,stiffening ridges. In some embodiments, the collection chamber is formedwith a plastic thermoforming process. The collection chamber may bemanufactured using any suitable process. For example, the collectionchamber may be injection molded. In some embodiments, the collectionchamber, the suction nozzle, and the suction inlet may be a unitarypiece. In some embodiments, the collection chamber, the suction nozzle,and the inlet may be integrally formed, such as by thermoforming. Inother embodiments, one more of the collection chamber, the suctionnozzle, and the suction inlet may be separately formed and attached.

As mentioned above, a cleaning sheet may be attached to the collectionchamber. The cleaning sheet may be formed of any suitable material, andmay be made of a single layer or multiple layers. In the illustratedembodiment, the cleaning sheet includes multiple layers including amultifunctional strip 138, a face layer 139, and first and secondabsorbent layers 140 and 141. The face layer and absorbent layers may bemade from various non-woven materials, woven materials, and/or plastics,or any other suitable materials. The absorbent layers may be configuredto wick moisture away from the face layer. The multifunctional strip 138may be used for scrubbing in some embodiments. In some embodiments, themultifunctional strip may provide friction to help prevent the cleaningdevice from slipping when propped against a wall.

In some embodiments, the air filter material may be limited to specificsections of the collection chamber. For example, a top chamber wallsimilarly arranged to the air filter 128 shown in FIG. 7 may have airpermeable sections only at or near lateral ends of the top chamber wall,and have air impermeable material in the remaining section. In otherembodiments, air permeable sections may be positioned close to acentered inlet opening on both sides of the inlet opening. In stillother embodiments, a collection chamber may include more than one inletopening and a cover for each of the openings.

A cover may include portions which extended downwardly into the inletopening and/or around the outside of the chamber inlet opening. Forexample, a collar may be attached to an underside of the air filter suchthat when the vacuum cleaner is turned off and the air filter returns toa home position, the collar cover some or all of the perimeter of theinlet opening.

One example of such an embodiment is shown in FIG. 8. A collar 142 isconnected to an underside of air filter 124. When the air filter ismoved to a home position, the collar is positioned next to, or incontact with, an outside of wall 120. The air filter and is shownslightly higher than the home position in FIG. 8. The collar may be madeof a rigid material or may be made of a flexible material.

FIG. 9 shows an embodiment where a downwardly extending member ispositioned inside the inlet opening when the air filter is in the homeposition. A collar 144 is adapted to be positioned next or in contactwith an inside of wall 120. As with the embodiment illustrated in FIG.8, the collar may be made of a rigid material or a flexible material.The downwardly extending cover structures shown in FIGS. 8 and 9 may beused in addition to or instead of a substantially horizontal coverportion of the air filter.

A cover stabilizer may be implemented to help maintain contact betweenthe cover and the rim of the inlet opening. For example, as shown inFIG. 10, a cover stabilizer 150 has a similar shape to the rim of theoutlet opening shown in FIGS. 3-4. Stabilizer 150 is pivotally attachedto the air filter at a pivot joint 152, and is biased downwardly by atorsion spring 154. The force applied by the stabilizer 150 may pressthe underside of air filter 128 in to secure contact with the rim of theair inlet opening. The weight of the stabilizer and the strength of thetorsion spring may be configured such that when the air filter is liftedfrom the collection chamber, the stabilizer does not overly deforms theshape of the air filter. In some embodiments, a mechanical limit to therotation of the stabilizer may be implemented, for example at the pivotjoint 152.

A conduit end does not have to be fully exposed to be considered to bean inlet opening that is not covered by a cover. For example, if the airinlet opening for a debris collection chamber is formed by an uprightcylindrical column with a top circular rim, and an air filter is removedfrom a sufficient portion of the circular rim during vacuuming to permitflow of air and debris into the collection chamber, the air inletopening may be considered to be not covered by the air inlet openingcover.

As mentioned above, the air filter (or other collection chamber wall)may be connected to the collection chamber without any elasticconnectors. FIG. 11 shows one embodiment where the air filter 128 isattached to the collection chamber with a pleated material 129. The airfilter 128 is shown slightly lifted from the collection chamber in FIG.11. When negative pressure is applied to the air filter, the air filterpulls on and unfolds the pleats. When the negative pressure is released,the pleats may be biased to return toward their folded position suchthat the air filter covers the chamber inlet opening. In someembodiments, a cover stabilizer, such as the stabilizer shown in FIG.10, may be used in conjunction with a pleated arrangement or othernon-elastic arrangement.

Instead of, or in addition to, using air filter 128 as the top wall ofthe collection chamber, the pleated material may be formed of an airfilter material. For example, the top wall may be formed with an airimpermeable material, and the vacuum cleaner may be configured toencompass at least the top wall and the pleated sides. When negativepressure is applied, the top wall is lifted upwardly, exposing the airfilter material of the pleated sides. Air is then withdrawn from thecollection chamber via the pleated sides.

While the embodiments illustrated herein show the air filter positionedsuch that the filter acts as a top wall of the collection chamber, theair filter may be positioned elsewhere on the collection chamber andstill function as a removable cover for the chamber inlet opening. Forexample, instead of facing upwardly as shown in FIGS. 3-4, the chamberinlet opening may face rearwardly, and the air filter may be positionedat the back of the collection chamber. In the home position, the airfilter may be held against the chamber inlet opening, for example withelastic connectors, to cover the inlet opening. When negative pressureis applied, the air filter be moved away from the chamber inlet opening.

In still other embodiments, more than one wall of the collection chambermay move in response to negative pressure. A movable wall may be aflexible bag structure. A wall is not necessarily required to be planaror rigid. For example, an entire debris collection chamber may be formedas a flexible bag attached to the chamber inlet opening. A portion ofthe bag may be positioned against the chamber inlet opening when nonegative pressure is applied, and then as the bag expands from theapplication of negative pressure, the portion of the bag covering thechamber inlet opening moves away to allow debris-entrained air to enterthe bag. As described herein, walls may be planar and/or rigid, andcollection chambers may have a combination of rigid and flexible walls.

Applying a negative pressure to a collection chamber includes applying anegative pressure to the outside of an air permeable portion of thechamber and/or applying a negative pressure to an opening in thecollection chamber.

In some embodiments, when the cleaning head is attached to the cleaningdevice, at least a portion of the debris collection chamber may becovered by the cleaning device. For example, in some embodiments, thedebris collection chamber may be covered by the connector 106 used toconnect the cleaning head to the cleaning device.

A divider 160 (see FIG. 4) may be provided to stiffen the collectionchamber, though some embodiments include no such divider. Additionalwalls similar to divider 160 may be positioned in the collection chamberto guide air flow within the collection chamber.

Suction nozzle 107 may extend laterally along a front portion of thecleaning head. The suction nozzle may have any suitable shape and size.The suction nozzle may extend along an entire width of the cleaning headin some embodiments. Instead of being attached to the debris collectionchamber, the suction nozzle may be formed on part of the vacuum cleanerdevice. In such an embodiment, once the collection chamber is attachedto the vacuum cleaner, the suction nozzle forms a flow path to thecollection chamber inlet opening.

The vacuum cleaner may include one or more actuators for actuating thesuction source, and one or more actuators for actuating liquidapplication. The suction source may be an electric motor in someembodiments.

Cleaning heads described herein may be constructed and arranged topermit efficient packing in some embodiments. For example, the debriscollection chamber and suction nozzle may be sized and positioned on acleaning sheet and/or support structure such that an inverted cleaninghead is stackable on an upright cleaning in such a manner that theupwardly-facing surface is substantially level. As can be seen in FIG.11, eight cleaning heads 108 are stacked, and the cleaning headsalternate between being upright and being inverted. The suction nozzles107 are sized and position to not interfere with the adjacently stackedcleaning heads.

While the present teachings have been described in conjunction withvarious embodiments and examples, it is not intended that the presentteachings be limited to such embodiments or examples. On the contrary,the present teachings encompass various alternatives, modifications, andequivalents, as will be appreciated by those of skill in the art.Accordingly, the foregoing description and drawings are by way ofexample only.

Various aspects of the present invention may be used alone, incombination, or in a variety of arrangements not specifically discussedin the embodiments described in the foregoing and is therefore notlimited in its application to the details and arrangement of componentsset forth in the foregoing description or illustrated in the drawings.For example, aspects described in one embodiment may be combined in anymanner with aspects described in other embodiments.

Also, embodiments of the invention may be embodied as a method, of whichan example has been provided. The acts performed as part of the methodmay be ordered in any suitable way. Accordingly, embodiments may beconstructed in which acts are performed in an order different thanillustrated, which may include performing some acts simultaneously, eventhough shown as sequential acts in illustrative embodiments.

Use of ordinal terms such as “first,” “second,” “third,” etc., in theclaims to modify a claim element does not by itself connote anypriority, precedence, or order of one claim element over another or thetemporal order in which acts of a method are performed, but are usedmerely as labels to distinguish one claim element having a certain namefrom another element having a same name (but for use of the ordinalterm) to distinguish the claim elements.

Also, the phraseology and terminology used herein is for the purpose ofdescription and should not be regarded as limiting. The use of“including,” “comprising,” or “having,” “containing,” “involving,” andvariations thereof herein, is meant to encompass the items listedthereafter and equivalents thereof as well as additional items.

1. A replacement head for use with a cleaning device, comprising: ahousing having a suction inlet for allowing debris to flow therethrough,and a dirt collection chamber configured to receive debris from thesuction inlet, at least a portion of at least one wall of the dirtcollection chamber being movable in response to a vacuum force appliedto the dirt collection chamber; and a cleaning sheet coupled to thehousing and having a surface configured to contact a surface to becleaned; wherein the housing is configured to couple to a cleaningdevice such that a vacuum source can apply a vacuum force to the dirtcollection chamber to draw debris through the suction inlet into thedirt collection chamber.
 2. The replacement head of claim 1, wherein thedirt collection chamber comprises a flexible bag.
 3. The replacementhead of claim 2, wherein a portion of the flexible bag covers thesuction inlet and is configured to move away from the suction inlet whena vacuum force is applied to the dirt collection chamber.
 4. Thereplacement head of claim 1, wherein at least a portion of the dirtcollection chamber is air permeable to allow a vacuum force to beapplied to the dirt collection chamber while retaining debris therein.5. The replacement head of claim 1, wherein the housing includes atleast one engagement element configured to mate with an engagementelement on a cleaning device for removably attaching the replacementhead to a cleaning device.
 6. The replacement head of claim 1, whereinthe cleaning sheet is planar.
 7. A replacement head for use with acleaning device, comprising: a cleaning sheet having a surfaceconfigured to contact a surface to be cleaned; a housing mounted on thecleaning sheet and having a bag therein defining a dirt collectionchamber, at least a portion of the bag being flexible, and the bag beingcoupled to an inlet in the housing for allowing debris to flow into thedirt collection chamber.
 8. The replacement head of claim 7, wherein thehousing is directly attached to the cleaning sheet.
 9. The replacementhead of claim 7, wherein the housing is permanently attached to thecleaning sheet.
 10. The replacement head of claim 7, wherein at least aportion of the bag is air permeable to allow a vacuum force to beapplied to the dirt collection chamber while retaining debris therein.11. The replacement head of claim 7, wherein a portion of the bag coversa suction inlet in the housing and is configured to move away from thesuction inlet when a vacuum force is applied to the dirt collectionchamber.
 12. The replacement head of claim 7, wherein the housingincludes a suction inlet adjacent to an edge of the cleaning sheet. 13.The replacement head of claim 7, wherein the housing includes at leastone engagement element configured to mate with an engagement element ona cleaning device for removably attaching the replacement head to acleaning device.
 14. The replacement head of claim 7, wherein thecleaning sheet is planar.
 15. A replacement head for use with a cleaningdevice, comprising: a housing having a suction inlet configured toreceive debris and a portion configured to couple to a vacuum source; aflexible bag disposed within the housing and coupled to the suctioninlet, the flexible bag including an air-permeable portion configured toallow a vacuum source coupled to the housing to apply a vacuum force tothe dirt collection chamber to draw debris through the suction inlet forcollection within a dirt collection chamber; and a cleaning sheetcoupled to the housing and configured to contact a surface to becleaned.
 16. The replacement head of claim 15, further wherein the bagis configured to expand in response to a vacuum force applied to thedirt collection chamber.
 17. The replacement head of claim 15, whereinthe cleaning sheet is removably attached to the housing.
 18. Thereplacement head of claim 15, wherein the housing includes at least oneengagement element configured to mate with a corresponding engagementelement on a cleaning device to mate the replacement head to thecleaning device.
 19. The replacement head of claim 15, wherein thecleaning sheet is planar.